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Redshift space clustering of galaxies and cold dark matter modelThe distorting effect of peculiar velocities on the power speturm and correlation function of IRAS and optical galaxies is studied. The observed redshift space power spectra and correlation functions of IRAS and optical the galaxies over the entire range of scales are directly compared with the corresponding redshift space distributions using large-scale computer simulations of cold dark matter (CDM) models in order to study the distortion effect of peculiar velocities on the power spectrum and correlation function of the galaxies. It is found that the observed power spectrum of IRAS and optical galaxies is consistent with the spectrum of an Omega = 1 CDM model. The problems that such a model currently faces may be related more to the high value of Omega in the model than to the shape of the spectrum. A low-density CDM model is also investigated and found to be consistent with the data.
Document ID
19930051790
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bahcall, Neta A. (NASA Headquarters Washington, DC United States)
Cen, Renyue (Princeton Univ. Observatory, NJ, United States)
Gramann, Mirt (Princeton Univ. Observatory, NJ; Tartu Astrophysical Observatory, Toravere, Estonia)
Date Acquired
August 16, 2013
Publication Date
May 10, 1993
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 408
Issue: 2
ISSN: 0004-637X
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF AST-90-20506
CONTRACT_GRANT: NSF AST-91-08103
CONTRACT_GRANT: NAGW-2448
Distribution Limits
Public
Copyright
Other